This is because the duvet is not well fixed on the quilt cover, so two pieces of cloth can be used to fix the duvet on the quilt cover. The following are the specific steps:

Tools needed: needle and thread, cloth.

1. First, pull one corner of the duvet out of the quilt cover.

2. Fix the cloth strip on the corner of the duvet with needle and thread.

3. Similarly, fix another piece of cloth on the corner of the quilt cover.

In this way, two corners of a piece of cloth are sewn.

5. Tie two pieces of cloth into a knot.

6. This will get married.

7. Put the duvet back into the quilt cover.

8. That's it. Not only will the duvet fit the quilt cover, but there is no trace on the appearance, and the effect is good.